High Precision Parallel Twin Screw Extruder

High Precision Parallel Twin Screw Extruder

Product Overview

This high-precision parallel twin screw extruder is designed for applications with strict requirements for micrometer level dimensional accuracy and melt uniformity. As a core equipment in the high-end plastic processing field, this plastic extruder is positioned in research and development institutions and high-end manufacturing enterprises, committed to achieving ultimate control of material stability in every process from polymer powder to high-value particles, ensuring that every batch of plastic granulation meets the highest quality standards.

Core Features
·Ultra high torque density: Equipped with a high-performance gearbox with a specific torque of up to 18 Nm/cm ³, it can achieve higher filling rates and better additive dispersion effects compared to ordinary twin screw extruders.
·Micron level screw centering accuracy: using precision grinding of the screw and spline shaft, the concentricity runout error is less than 0.02mm, ensuring the long-term operational stability and service life of the high-precision twin screw extruder from the mechanical source.
·Modular cylinder design: The segmented cylinder can be flexibly configured with feeding, exhaust, vacuum and other areas according to the process, especially suitable for plastic granulation processes with complex formulas.
·Intelligent PID temperature control: The closed-loop temperature control module controls the temperature fluctuation of the melt within ± 1 ℃, which is particularly critical for the processing of thermosensitive engineering plastics.
·High wear resistance configuration: The cylinder liner and threaded components are made of powder metallurgy tool steel (hot isostatic pressing process), which has a wear resistance life of more than three times that of conventional nitriding steel under plastic extrusion conditions.

Technical parameters

Noted: Details depend on your requirements and need.

Equipment advantages

Ordinary plastic extruders often face problems such as uneven plasticization and large differences in material thermal history during the processing, but this high-precision twin screw extruder solves these problems from the design source. Our core advantage lies in our unique screw configuration technology - unlike traditional twin screw extruders that rely solely on shear dispersion, we have optimized the ratio of shear flow to stretching flow, resulting in more uniform heating of the melt during the mixing process and significantly improving the homogenization of plastic granulation.

For manufacturers entering the field of high value-added materials, this difference directly translates into lower unit energy consumption, narrower molecular weight distribution, and excellent ability to handle high viscosity and high filling materials. Nanjing Kelongwell Chemical Machinery Co., Ltd. not only provides you with a plastic extruder, but also a complete solution that guarantees sustained investment return rate with micrometer level precision.

Application Fields
This plastic extruder can widely serve the following high-tech industries:
·Engineering plastics: compounding and granulation of reinforced modified materials such as PA6, PA66, PBT, PC/ABS (glass fiber, carbon fiber).
·Production of color masterbatch: high concentration white, black, and colored masterbatch for plastic granulation scenarios that require extremely high dispersibility.
·Reactive extrusion: Chemical reactions such as polymerization and grafting that require precise control of residence time.
·Biodegradable materials: plastic extrusion granulation of film grade or injection grade raw materials such as PLA, PBAT, PBS, etc.
·High filling system: a mixing process with a filling amount of over 70%, such as calcium carbonate, talc powder, flame retardant, etc.

Customized services
Nanjing Kelongwell Chemical Machinery Co., Ltd. is well aware that different material formulas have vastly different equipment requirements. We provide comprehensive OEM/ODM customization services:
·Customized screw components: Design special shaped kneading blocks, conveying components, and mixing sections based on the rheological properties of the material.
·Customized cylinder layout: Optimize the position of lateral feeding, liquid injection port, and vacuum exhaust port to match specific process requirements.
·Automation integration: Provide customized PLC control system and downstream auxiliary equipment (such as drawbar water tank, underwater pelletizing, water ring pelletizing, etc.) to achieve full process automation of plastic extrusion production line.
·Brand image: Equipment appearance colors and logos can be customized according to customer requirements.

Common Problems
Q: What are the main differences between high-precision twin screw extruders and ordinary twin screw extruders?
A: The core difference lies in manufacturing accuracy and screw configuration design. Ordinary twin screw extruders usually have a jumping error of 0.05-0.1 mm, which can easily lead to local shear overheating; And our high-precision twin screw extruder has a runout error controlled within 0.02 mm, and uses special tooth shapes or efficient kneading blocks, emphasizing distributed mixing rather than dispersed mixing, making the material temperature more uniform during plastic granulation, especially suitable for the processing of heat sensitive and high filling materials, which is difficult for ordinary plastic extruders to achieve.

Q: How does this equipment ensure particle quality during the granulation of engineering plastics?
A: The high-precision twin screw extruder maintains the stability of the melt at the head through a precise temperature control of ± 1 ℃ and a high torque transmission system. For engineering plastics such as nylon and polycarbonate, temperature fluctuations during plastic granulation are the main cause of "fine tailings" and irregular particles. This device can achieve low-temperature plasticization, effectively maintaining the intrinsic viscosity (IV) of the polymer, thereby obtaining high-quality particles with uniform appearance and consistent performance.

Q: Can the equipment process high abrasion materials such as fiberglass reinforcement?
A: Sure. For plastic extrusion under high wear conditions such as fiberglass and mineral filling, we provide hot isostatic pressed sintered alloy cylinders and threaded components, which have much better wear resistance than the bimetallic bushings of ordinary twin screw extruders. When dealing with high content glass fiber or high hardness fillers, the lifespan of key components of the equipment can be extended by 2-3 times.

Q: Does your company only provide twin screw extruders, or can you provide the entire production line?
A: Nanjing Kelongwell Chemical Machinery Co., Ltd. provides complete turnkey projects. In addition to high-precision twin screw extruders, we also design and integrate high-speed mixers, automatic batching systems, strip cutting or underwater cutting systems, centrifugal dewatering machines, and automatic packaging units to ensure seamless connection of the entire plastic granulation line. Customers only need to connect with one supplier to complete the entire production line construction.

Q: How long does it usually take to customize a high-precision twin screw extruder?
A: The delivery time for standard models is about 35 days. For deeply customized plastic extrusion solutions involving special screw configurations, highly corrosion-resistant materials, or lateral feeding, the lead time is generally 50-70 days. This cycle includes strict assembly accuracy inspection and factory acceptance testing (FAT) to ensure that the final delivered equipment fully meets our promised high-precision standards.